Feb 21, · Muscular tissue is a specialized tissue in animals which applies forces to different parts of the body by contraction. It is made up of thin and elongated cells called muscle fibers. It controls the movement of an organism. The cytoplasm in the muscle fibers is called sarcoplasm. It contains a network of membrane called the sarcoplasmic reticulum. Oct 04, · Muscle tissue is a specialized tissue found in animals which functions by contracting, thereby applying forces to different parts of the body. Muscle tissue consists of fibers of muscle cells connected together in sheets and fibers. Together these sheets and fibers and known as muscles, and control the movements of an organisms as well as many other contractile functions.
In the muscular system, muscle tissue is categorized into three distinct types: skeletal, cardiac, and smooth. Each type of muscle tissue in the human body has a unique structure and a specific role. Skeletal muscle moves bones and other structures. Cardiac muscle contracts the heart to how to draw cartoon wars 2 characters blood.
The smooth muscle tissue that forms organs like the tye and bladder changes shape to facilitate bodily functions. Here are more details about the structure and function of each type of muscle tissue in the human muscular system. Skeletal muscles attach to and move bones by contracting and relaxing in response to voluntary messages from the nervous system.
Skeletal muscle tissue is composed of long cells called muscle fibers that have a striated appearance. Muscle fibers are organized into bundles supplied by blood vessels and innervated by motor neurons. Smooth muscle is found ia the walls of hollow organs throughout the body.
Smooth muscle contractions are involuntary movements triggered by impulses that travel through the autonomic nervous system to the smooth muscle tissue. The arrangement of cells within smooth muscle tissue allows for contraction and relaxation with great elasticity. The smooth muscle in the walls of organs like the urinary bladder and how to connect computer to printer uterus allow those organs to expand and relax as needed.
The smooth muscle of the alimentary canal the digestive tract facilitates the peristaltic waves that move swallowed food and nutrients. In the eye smooth muscle changes wwhat shape of the lens to bring objects into focus.
Artery walls include smooth muscle that relaxes and contracts to move blood through the body. The heart wall is composed of three layers. Cardiac muscle, found only in the myocardium, contracts in response to signals from the cardiac conduction system to make the heart beat. Cardiac muscle is made from cells called cardiocytes.
Like skeletal muscle cells cardiocytes have a striated appearance, but their overall structure is shorter and thicker. Cardiocytes are branched, allowing them to connect with several other cardiocytes, forming a network that facilitates coordinated contraction.
See more from our free eBook library. Newark: University of Delaware, Biological Sciences. How do muscles grow? Len Kravitz, Ph. Muscle Attachment and Actions. Muscle Contractions. Muscular System Pathologies. When you select "Subscribe" you will start receiving our email newsletter.
In dealing with muscular tissue, endurance becomes specific to individual muscle groups. The physiology of being in shape: adaptation at its best Constipation is common and the continual straining that is required to do the loo can result in breakdown of the muscular tissue around the . Muscle tissue is composed of cells that have the special ability to shorten or contract in order to produce movement of the body parts. The tissue is highly cellular and is well supplied with blood vessels. The cells are long and slender so they are sometimes called muscle fibers, and these are usually arranged in bundles or layers that are surrounded by connective tissue. Muscle Tissue Muscle is a soft tissue that is highly specialized for the production of tension which results in the generation of force. Muscle cells, or myocytes, contain myofibrils comprised of actin and myosin myofilaments which slide past each other producing tension that .
Muscle is a soft tissue that is highly specialized for the production of tension which results in the generation of force. Muscle cells, or myocytes, contain myofibrils comprised of actin and myosin myofilaments which slide past each other producing tension that changes the shape of the myocyte.
Numerous myocytes make up muscle tissue and the controlled production of tension in these cells can generate significant force. Muscle tissue can be classified functionally, voluntary or involuntary and morphologically striated or non-striated. Voluntary refers to whether the muscle is under conscious control, striation refers to the presence of visible banding within myocytes which occurs due to organization of myofibrils to produce a constant direction of tension.
By applying the above classifications it is possible to describe three forms of muscle tissue which perform the wide range of functions described. Skeletal muscle mainly attaches to the skeletal system via tendons to maintain posture and control movement for example contraction of the biceps muscle, attached to the scapula and radius, will raise the forearm.
Some skeletal muscle can attach directly to other muscles or the skin, as seen in the face where numerous muscles control facial expression. Skeletal muscle is under voluntary control, although this can be subconscious for example when maintaining posture or balance. Morphologically skeletal myocytes are elongated and tubular and appear striated with multiple peripheral nuclei. Cardiac muscle tissue is found only in the heart where cardiac contractions pump blood throughout the body and maintain blood pressure.
As with skeletal muscle cardiac muscle is striated, however it is not consciously controlled and so is involuntary. Cardiac muscle can be further differentiated from skeletal muscle by the presence of intercalated discs which control the synchronized contraction of cardiac tissues. Cardiac myocytes are shorter than skeletal equivalents and contain only one or two centrally located nuclei. Smooth muscle tissue is found associated with numerous other organs and tissue systems such as the digestive system or respiratory system.
It plays an important role in the regulation of flow in such tissues for example aiding the movement of food through the digestive system via peristalsis. Smooth muscle is non-striated, although it contains the same myofilaments they are just organized differently, and involuntary.
Learning Objectives Describe the types of muscle tissue. Key Takeaways Key Points Muscle tissue can be divided functionally, is it under voluntary or involuntary control; and morphologically, striated or non-striated.
By applying these classifications three muscle types can be described; skeletal, cardiac and smooth. Skeletal muscle is voluntary and striated, cardiac muscle is involuntary and straited and smooth muscle is involuntary and non-striated. Key Terms skeletal muscle : The voluntary muscle of vertebrates, which is striated and anchored by tendons to bone, is used to effect skeletal movement such as locomotion.
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